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參數(shù)資料
| 型號： | KK74HC221AD |
| 廠商： | KODENSHI CORP. |
| 英文描述： | Dual Monostable Multivibrator |
| 中文描述： | 雙單穩(wěn)態(tài)觸發(fā)器 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 327K |
| 代理商： | KK74HC221AD |
TECHNICAL DATA
KK
74HC221A
Dual Monostable Multivibrator
N SUFFIX
PLASTIC
D SUFFIX
SOIC
1
16
1
16
ORDERING INFORMATION
KK
74HC221AN Plastic
KK
74HC221AD SOIC
T
A
= -55
°
to 125
°
C for all packages
The
KK
74HC221A is identical in pinout to the LS/ALS221. The device
inputs are compatible with standard CMOS outputs; with pullup resistors,
they are compatible with LS/ALSTTL outputs.
There are two trigger inputs, A INPUT (negative edge) and
B INPUT (positive edge). These inputs are valid for rising/falling signals
The device may also be triggered by using the RESET input (positive-
edge) because of the Schmitt-trigger input; after triggering the output
maintains the MONOSTABLE state for the time period determined by the
external resistor R
EXT
and capacitor C
EXT
. Taking RESET low breaks this
MONOSTABLE STATE. If the next trigger pulse occurs during the
MONOSTABLE period it makes the MONOSTABLE period longer.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 3.0 to 6.0 V
Low Input Current: 1.0
μ
A
High Noise Immunity Characteristic of CMOS Devices
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
Note
A
B
RESET
Q
Q
H
H
Output
Enable
X
L
H
L
*
L
*
H
*
H
*
Inhibit
H
X
H
Inhibit
L
H
Output
Enable
L
H
Output
Enable
X
X
L
L
H
Inhibit
X = don’t care
*
- except for monostable period
PIN ASSIGNMENT
Note
(1) C
EXT
, R
EXT
, D
EXT
are external components.
(2) D
EXT
is a clamping diode.
The external capacitor is charged to V
CC
in the stand-by
state, i.e. no trigger. When the supply voltage is turned off
C
X
is discharged mainly through an internal parasitic diode.
If C
X
is sufficiently large and V
CC
decreases rapidy, there
will be some possibility of damaging the I.C. with a surge
current or latch-up. If the voltage supply filter capacitor is
large enough and V
CC
decrease slowly, the surge current is
automatically limited and damage the I.C. is avoided. The
maximum forward current of the parasitic diode is
approximately 20 mA.
C
EXT
R
EXT
D
EXT
C
EXT
R
EXT
D
EXT
1
2
3
5
4
6
7
8
16
15
14
13
12
11
10
9
GND
VCC
1R
/C
EXT
EXT
1C
EXT
1Q
2Q
2RESET
2B
2A
1A
1B
1RESET
1Q
2Q
2C
EXT
2R
/C
EXT
EXT
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KK74HC221AN | Dual Monostable Multivibrator |
| KK74HC240A | Octal 3-State Inverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS |
| KK74HC240ADW | Octal 3-State Inverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS |
| KK74HC240AN | Octal 3-State Inverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS |
| KK74HC241A | Octal 3-State Noninverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KK74HC221AN | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Dual Monostable Multivibrator |
| KK74HC240A | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Octal 3-State Inverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS |
| KK74HC240ADW | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Octal 3-State Inverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS |
| KK74HC240AN | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Octal 3-State Inverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS |
| KK74HC241A | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Octal 3-State Noninverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS |
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